Keywords
This is a segment of DNA that codes for a trait.
What is a gene?
This describes someone with two different alleles for a trait.
What is heterozygous?
This is a variant of a gene, like dominant or recessive.
What is an allele?
An organism that consistently passes on the same trait is called this.
What is true-breeding?
This refers to the genetic makeup of an organism, such as Aa or aa.
What is a genotype?
This is a person who carries a recessive allele but doesn't express it.
What is a carrier?
This is the physical trait expressed from a genotype, like tall or short.
What is a phenotype?
This type of allele only shows its effect when two copies are present.
What is a recessive allele?
This type of organism has two identical alleles for a gene.
What is homozygous?
This describes the stronger allele that shows even when only one copy is present.
What is a dominant allele?